Alten — Earnings Release 2013

May 3, 2013

Press release Paris, May 3rd 2013

BUSINESS IN THE FIRST QUARTER 2013 ADDITIONAL PRESS RELEASE

During the telephone conference held for the publication of Alten's business for the first quarter 2013, Alten answered questions relating to its business and operating margin and gave the following information:

• the organic growth, during the first half year 2013 would be worsened by about 1.8% and the operating margin would likely be between 8.5 and 9% of the turnover, due to a lesser number of working days during this first half year 2013, compared to 2012 first half year (-2.3 working days),
• for the same reasons, except in case of deterioration of the economic environment, the operating margin for the entire year would likely be between 9 and 10% of the 2013 turnover.

As a European Leader in Technology Consulting and Engineering (TCE), ALTEN carries out design and research projects for Technical and IT divisions of major clients in industry, telecoms and services. ALTEN's stock is listed in compartment B of the Euronext Paris market (ISIN FR0000071946); it is part of the SBF 120, the IT CAC 50 index and MIDCAP 100, and is eligible for the Deferred Settlement Service (SRD).

Technology Consulting and Engineering (TCE)

For more information: www.ALTEN.fr Contact: Matthieu Roquet Montégon 06 16 92 80 65